Regionalization of perinatal care: results of a cooperative community based program.
D001034:Apgar Score; D001724:Birth Weight; D003362:Cost-Benefit Analysis; D003695:Delivery of Health Care / Q000191:economics / Q000458:organization & administration*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D010500:Perinatology; D011247:Pregnancy; D012040:Regional Health Planning / Q000458:organization & administration*